William e



(No Model.)

W. R. FIELD & L. E. HGGUE.

OUT-OFF FOR GAS. No. 361,684. Patented Apr.- 26, 1887.

UNITED Srn'rns ATENI Fries,

WVILLIAM It. FIELD AND LOVREN EDKVIN HOGUE, OF GREENVILLE, PA.

CUT-OFF FOR GAS.

SPECIFICATION forming part of Letters Patent No. 361,684, dated April26, 1887.

Application filed December 4, 1886. Serial No. 220,717. (No model.) v

To a whom it may concern.-

Be it known that we, WILLIAM R. FIELD and LovREN EDWIN HOGUE, citizensof the United States, residing at Greenville, in the county of Mercerand State of Pennsylvania, have invented acertain new and usefulImprovement in Out-Offs for Gas; and we do hereby declare that thefollowing is a full, clear, and exact description of the same, referencebeing had to the annexed drawing, making a part of this specification,and to the letters and figu res of reference marked thereon.

The present invention has. relation to that class of valves providedwith a push-pin at the bottom of the valveshell, for the purpose of 7opening the valve to form a waste,and a spring to automatically forcethe pin or stem back into position. In this class of valve it has beencommon to provide a single valve-stem with two valves, whichcoacted,when the stem was operated,to open and close the valve-passages;also,providing a stem at the top of the valve-shell, adjustable therein,to limit the movement of the stem carrying the valves.

It is the object of the present invention to the shell or body of thevalve, provided with the usual interior screw-thread for connectingthereto the screw-threaded ends of the pipesection, and alsoscrew-threads at its top to receive the dome B, which may be of theusual construction, and is provided with a suitable stuffingbox, a,through which passes the screw-threaded stem b, having at its upper enda hand-wheel, O, for turning it.

The dome B is cast with a guide, a, through which passes the end of thestem (1, which is provided with a valve, D, at its lower end,

which rests on the valve-seat 6. Some distance above the valve D is asecond valve, E. The lower or bottom portion of the shell A is cast withan interior screw-threaded extension, F, in which is inserted a suitablestuffing-box,f,

through which passes a stem, G, having a ta peringend, g, and shoulderh, and around this tapering end of the stem is located a spiral spring,H, the lower end of which rests upon the shoulder.

When screwing down the stem b,the'end thereof will strike the upper endof the valvestem cl andforce the valves D E into position, as shown infull lines, which practically closes the former one of said valves,while the valve E is left open.

- It should be noticed that the action. of the stem Gis the same as thatof a push-pin to open the valve in order to form a waste, and when thestem is forced up by pressure to open the valve the spring will force itback into position. I

Immediately above the valve-seat e is a partition or diaphragm, I, whichkeeps the gas when entering at azfrom passing down through and into thepassage '5 and the outlet y. This partition or diaphragm is not attachedto the valve-stem d, but, on the contrary, admits of the stem and valvethereof moving up and down without moving'the partition or diaphragmfrom its seat I; but when the valves and stem are taken out or removedfrom the shell A the partition or diaphragm comes with them, the samehanging loose on the stem between the two valves, and also forms a guidefor the stem. It will be noticed that the valve E does not come downclose upon its seat, but

extends above some little distance, as shown in the drawing.

The gas passes from the pipe into the valveshell, as indicated by thearrow, the gas in its course passing through inlet 00 into the valveshell or chamber at above the valve E, and thence through passage 2' tothe chamber a above the valve D. The stem 6 is raised up clear ofvalve-stem d, as shown, and the stem G is pushed up until it strikesvalve D,which opens it and allows the gas above said valve to passthrough the valve-opening and out through the outlet y, causing acontinuous circulation of the infiowing gas. By pushing the stem G stillhigher, the stem (1 will carry with it the lifting-valve E to close thespace between the inlet 00 and chamber m, the pressure of the gascarrying it up to the position as indicated by dotted lines, when it isthen in working order.

It should be understood that the push-pin or stem G only carries thevalve E into the space which forms a communication between the inlet a;and chamber m, so that should there be no pressure of the gas the valvewould not open, as the push-pin or stem is forced back into position bythe spring H, which allows the valve D to drop back onto itsseat and remain closed against all pressure, the pressure only tightening thevalveagainst theseatr It will be also noticed that the valve cannot beopened or remain open an instant without pressure and consequentcirculationof gas.

When the valve D is open,the stem b can be forced down in contact withthe valve-stem, which will force the valve E partially into the ingressopening or chamber-m, reducing the firein proportion as the chamber isclosed; but when the valve E is forced below the ingress 1 opening orchamber, or at the bottom thereof, it drops to the position shown in thedrawing, no matter how great the pressure of the inflowing gas.

Having now fully described our invention, what we claim as new, anddesire to secure by Letters Patent, is

In a gas or other valve, the shell A,provided with double passages i yat the discharge end or side thereof, and the chambers mmdivided bymeans of the diaphragm I, in combination with the stem d, carrying thevalves D E, the screw-stem b, and push-pin G, substantially as and forthe purpose set forth. 1

In testimony that we claim the above we have hereunto subscribed ournames in the presence of two witnesses.

WILLIAM R. FIELD. LOVREN EDWIN HOGUE.

Witnesses:

R. MAXWELL, O. A. HOUSE.

